1-GetImageOrientation.php

<?php

$Image = new Imagick($Filename);
$Orientation = $Image->GetImageOrientation();

2-TopRight.php

<?php

$Image = new Imagick($Filename);
$Orientation = $Image->GetImageOrientation();

if($Orientation === Imagick::ORIENTATION_RIGHTTOP) {
	$Image->RotateImage('#000000',-90);
}

3-FlipFlopFloop.php

<?php

$Image = new Imagick($Filename);
$Orientation = $Image->GetImageOrientation();

if($Orientation === Imagick::ORIENTATION_TOPRIGHT) {
	$Image->FlopImage();
}

4-FullCode.php

<?php

$Image = new Imagick($Filename);
$Flop = FALSE;
$Rotate = 0;

// determine the orientation of the image.

switch($Image->GetImageOrientation()) {
	case Imagick::ORIENTATION_TOPLEFT:
		$Rotate = 0;
	break;
	case Imagick::ORIENTATION_RIGHTTOP:
		$Rotate = -90;
	break;
	case Imagick::ORIENTATION_BOTTOMRIGHT:
		$Rotate = 180;
	break;
	case Imagick::ORIENTATION_LEFTBOTTOM:
		$Rotate = 90;
	break;

	case Imagick::ORIENTATION_TOPRIGHT:
		$Flop = TRUE;
		$Rotate = 0;
	break;
	case Imagick::ORIENTATION_RIGHTBOTTOM:
		$Flop = TRUE;
		$Rotate = -90;
	break;
	case Imagick::ORIENTATION_BOTTOMLEFT:
		$Flop = TRUE;
		$Rotate = 180;
	break;
	case Imagick::ORIENTATION_LEFTTOP:
		$Flop = TRUE;
		$Rotate = 90;
	break;
}

// handle any rotation needed.

if($Rotate !== 0)
$Image->RotateImage('#000000',$Rotate);

// mirror image if needed.

if($Flop === TRUE)
$Image->FlopImage();

// then force a normal orientation and overwrite.

$Image->SetImageOrientation(Imagick::ORIENTATION_TOPLEFT);
$Image->WriteImage($Filename);

5-FallingSwitch.php

<?php

switch($Image->GetImageOrientation()) {
	case Imagick::ORIENTATION_TOPRIGHT:
		$Flop = TRUE;
	case Imagick::ORIENTATION_TOPLEFT:
		$Rotate = 0;
	break;

	case Imagick::ORIENTATION_RIGHTBOTTOM:
		$Flop = TRUE;
	case Imagick::ORIENTATION_RIGHTTOP:
		$Rotate = -90;
	break;

	case Imagick::ORIENTATION_BOTTOMLEFT:
		$Flop = TRUE;
	case Imagick::ORIENTATION_BOTTOMRIGHT:
		$Rotate = 180;
	break;

	case Imagick::ORIENTATION_LEFTTOP:
		$Flop = TRUE;
	case Imagick::ORIENTATION_LEFTBOTTOM:
		$Rotate = 90;
	break;
}